CN113670789B - Method and device for pressurized water test - Google Patents
Method and device for pressurized water test Download PDFInfo
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- CN113670789B CN113670789B CN202110856091.9A CN202110856091A CN113670789B CN 113670789 B CN113670789 B CN 113670789B CN 202110856091 A CN202110856091 A CN 202110856091A CN 113670789 B CN113670789 B CN 113670789B
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 194
- 238000012360 testing method Methods 0.000 title claims abstract description 98
- 238000000034 method Methods 0.000 title abstract description 10
- 229920001971 elastomer Polymers 0.000 claims abstract description 64
- 239000005060 rubber Substances 0.000 claims abstract description 64
- 239000002775 capsule Substances 0.000 claims abstract description 45
- 238000007789 sealing Methods 0.000 claims description 114
- 238000005553 drilling Methods 0.000 claims description 15
- 230000006835 compression Effects 0.000 claims description 11
- 238000007906 compression Methods 0.000 claims description 11
- 229910000831 Steel Inorganic materials 0.000 claims description 4
- 239000010959 steel Substances 0.000 claims description 4
- 239000008400 supply water Substances 0.000 claims description 3
- 238000010998 test method Methods 0.000 claims description 3
- -1 at the moment Substances 0.000 claims description 2
- 239000011435 rock Substances 0.000 claims description 2
- 238000004880 explosion Methods 0.000 claims 1
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 6
- 229920002635 polyurethane Polymers 0.000 description 3
- 239000004814 polyurethane Substances 0.000 description 3
- 210000004907 gland Anatomy 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 210000002445 nipple Anatomy 0.000 description 2
- 239000004677 Nylon Substances 0.000 description 1
- 230000009172 bursting Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
- G01N15/08—Investigating permeability, pore-volume, or surface area of porous materials
- G01N15/082—Investigating permeability by forcing a fluid through a sample
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Abstract
The invention relates to a method and a device for a pressurized water test, and belongs to the technical field of water conservancy and hydropower exploration. The technical proposal is as follows: the inner assembly is connected with a pressurized water test capsule, the pressurized water test capsule comprises a pressure maintaining pipe (7), a guide pipe (8), a pressure resisting rubber pipe (12), a one-way valve (13) and a rupture disk (15), the guide pipe (8) is a hollow long rod, the pressure maintaining pipe (7) is arranged on the side surface of the upper part of the guide pipe (8), the pressure maintaining pipe (7) is communicated with the pressure resisting rubber pipe (12), the guide pipe (8) is positioned in the pressure resisting rubber pipe (12), and the rupture disk (15) is arranged at the lower part of the guide pipe (8); the one-way valve (13) is arranged between the guide pipe (8) and the pressure-resistant rubber pipe (12). The invention has the beneficial effects that: the rope drill rod does not put out the hole, the water pressure is used for expanding the water pressure test capsule to finish the water pressure test, no extra equipment is added, the labor intensity is low, the time is saved, and the market space is wide.
Description
Technical Field
The invention relates to a method and a device for a pressurized water test, and belongs to the technical field of water conservancy and hydropower exploration.
Background
In the field of hydraulic and hydroelectric engineering, it is often necessary to test the water permeability of rock mass by using a pressurized water test, and two conventional methods for the pressurized water test in the prior art are available: a common drill rod and a common drilling tool are used for drilling, the whole drill rod is lifted out of a hole for coring after each drilling is completed, and then the drill rod is put into a water pressing device for a water pressing test. The other is to drill with a rope, core the core by using a rope coring process, and the method of the water pressing test is divided into two types, namely, the drill rod is lifted out of the hole and is put into a common drill rod to perform the water pressing test, and the other is to directly put into a water pressing device in the rope drill rod, and the drill rod is not lifted out of the hole. The prior art has the following problems: the air bag is usually required to be opened by preparing an air source on the well, the operation process is complex, the air pipe is easy to damage, and the air bag is slowly recovered.
Disclosure of Invention
The invention aims to provide a method and a device for a water pressure test, wherein a rope drill rod does not lift out of a hole, an air bag is inflated by water pressure, the water pressure test is completed, no additional equipment is added, the labor intensity is low, the time is saved, and the technical problems in the prior art are solved.
The technical scheme of the invention is as follows:
A device for a pressurized water test comprises an inner assembly, a drill bit and a pressurized water test capsule which are sequentially connected from top to bottom; the inner assembly is arranged in the outer pipe system; the lower end of the outer pipe system is provided with a drill bit; the inner assembly is connected with a pressurized water test capsule, the pressurized water test capsule comprises a pressure maintaining pipe, a guide pipe, a pressure-resistant rubber pipe, a one-way valve and a rupture disk, the guide pipe is a hollow long rod, the side surface of the upper part of the guide pipe is provided with the pressure maintaining pipe, the pressure maintaining pipe is communicated with the pressure-resistant rubber pipe, the guide pipe is positioned in the pressure-resistant rubber pipe, and the lower part of the guide pipe is provided with the rupture disk; the one-way valve is arranged between the guide pipe and the pressure-resistant rubber pipe.
The inner assembly consists of a salvaging head, a sealing ring, a joint, a water pipe and a sealing seat which are all hollow structures, and a water hole A is formed in the middle; the inner assembly is connected with the pressurized water test capsule through a nipple.
The lower part of the salvaging head is connected with the upper part of the water pipe through a connector, a sealing ring is arranged on the connector, and the lower part of the water pipe is connected with a sealing seat; the upper end of the salvaging head is a pointed cone structure with a water channel, the lower end of the pointed cone structure is a cylinder with smaller diameter, and the cylinder is matched with the salvaging device for use; the sealing ring is of a stepped hollow cylinder structure, a sealing step is formed by a step positioned on the outer circle, a seat ring is arranged in the outer tube system, the smaller diameter of the sealing step is smaller than that of the seat ring, the sealing step is clamped in the seat ring, a compression gap is reserved between the sealing ring and the seat ring, and the compression gap is 3-5mm.
The sealing seat has a centralizing function and is of a hollow structure with a large middle part and small two ends, the upper end of the sealing seat is connected with a water pipe, the lower end of the sealing seat is provided with a sealing gasket, a centralizing ring is arranged in an outer pipe system, the maximum outer diameter of the sealing seat is matched with the centralizing ring, and the centralizing inner assembly is centralized; the lower end of the outer tube system is provided with a drill bit, the upper end of the drill bit is provided with a concave sealing angle I, the lower end of the sealing gasket is provided with a convex sealing angle II, and the sealing angle II is matched with the sealing angle I of the drill bit in a convex-concave mode.
The joint is of a hollow cylindrical structure, a sealing ring is arranged on the joint, and connecting threads are arranged at the upper end and the lower end of the joint; the water pipe is of a hollow cylindrical structure, and connecting threads are arranged at two ends of the water pipe; the sealing gasket is of a hollow cylinder structure, and a second sealing angle is arranged on the lower end face of the sealing gasket.
The pressure maintaining pipe is a hollow rubber pipe with built-in steel wires; the guide pipe is a hollow long rod, the upper end of the guide pipe is provided with a connecting thread, the middle part of the pressure-resistant rubber pipe is provided with a water through hole, and the water through hole is provided with a one-way valve; the one-way valve can enable water to flow into the cavity of the pressure-resistant rubber tube from the guide tube.
The pressure-resistant rubber tube is characterized in that the upper end and the lower end of the pressure-resistant rubber tube are pressed into a whole through rubber tube joints and rubber tube jackets, sealing rings are arranged in the upper rubber tube joint and the lower rubber tube joint, a pressure release channel is arranged on the rubber tube joint at the upper end, and the pressure release channel is communicated with the inside of the pressure-resistant rubber tube.
The pressure-resistant rubber tube is matched with the guide tube through sealing rings at two ends and can slide on the guide tube.
The gland nut is arranged at the lower end of the guide tube, and the rupture disk is arranged at the lower end of the guide tube through the gland nut.
The inner pipe of the rope core drill and the inner assembly of the pressurized water testing device can be arranged in the outer pipe system.
The pressurized water test capsule needs to be able to descend from the inside of the drill bit into the borehole or be able to be lifted from the borehole into the drill pipe after pressure relief.
A method for a pressurized water test adopts the device, and comprises the following steps: ① The rope drill rod is used for driving the outer pipe system and the drill bit to drill downwards; ② When drilling to the required depth, core taking operation is carried out, and the inner pipe of the rope core drill tool is lifted out of the drill rod; ③ Lifting the rope core drill with the outer pipe system and the drill bit upwards to be above a hole section needing a pressurized water test; ④ The inner assembly of the pressurized water test is put into the hole bottom together with the pressurized water test capsule; ⑤ Water is supplied to the hole by water supply equipment on the ground, the rupture disc breaks through by expansion of the pressurized water test capsule, the check valve locks high-pressure water in the pressurized water test capsule, and water can be continuously supplied at the moment, so that pressurized water test can be carried out.
After the pressurized water test is finished, the drill rod is lifted upwards or the pressure maintaining pipe is pulled off by the fisher to open the pressure release channel, the pressurized water test capsule starts to release pressure at the moment, water is discharged, the drill rod can be fished out by the fisher after the pressurized water test capsule is restored to the original size, and the inner pipe assembly of the rope drilling tool is put into the pipe assembly to continue drilling.
The invention has the beneficial effects that: the rope drill rod does not put out the hole, the water pressure is used for expanding the water pressure test capsule to finish the water pressure test, no extra equipment is added, the labor intensity is low, the time is saved, and the market space is wide.
Drawings
FIG. 1 is a schematic illustration of a completion status of a wire-line coring drilling in accordance with an embodiment of the present invention;
FIG. 2 is a schematic representation of the coring completion status of an embodiment of the present invention;
FIG. 3 is a schematic diagram showing the lifting of a rope drill rod to a pressurized water test section according to an embodiment of the invention;
FIG. 4 is a schematic view of the assembly and pressurized water test capsule in place in an embodiment of the present invention;
FIG. 5 is a schematic diagram showing the state of the pressurized water test in which the pressurized water test capsule is completely inflated according to the embodiment of the present invention;
FIG. 6 is a schematic diagram showing the state of the capsule after recovery in the pressurized water test according to the embodiment of the present invention;
FIG. 7 is a schematic diagram showing the connection state of the assembly and the pressurized water test capsule in an embodiment of the invention;
FIG. 8 is a schematic diagram of an assembly in an embodiment of the invention;
FIG. 9 is a schematic diagram of a pressurized water test capsule according to an embodiment of the present invention;
FIG. 10 is a schematic view of a gasket according to an embodiment of the present invention;
FIG. 11 is a schematic view of a seal ring according to an embodiment of the present invention;
In the figure: the device comprises a fishing head 1, a sealing ring 2, a connector 3, a water passing pipe 4, a centralizing seat 5, a sealing gasket 6, a pressure maintaining pipe 7, a guide pipe 8, a pressure relief channel 9, a rubber pipe connector 10, a rubber pipe jacket 11, a pressure-resistant rubber pipe 12, a one-way valve 13, a water passing hole 14, a rupture disk 15, a compression nut 16, a first sealing angle 17, a drill bit 18, a second sealing angle 19, an outer pipe system 20, a sealing step 21, a seat ring 22, a centralizing ring 23, a water passing hole A24, a sealing ring 25, a short joint 26 and a compression gap A.
Detailed Description
The invention is further illustrated by the following examples in conjunction with the accompanying drawings.
A device for a pressurized water test, which comprises an inner assembly, a drill bit 18 and a pressurized water test capsule which are sequentially connected from top to bottom; the inner assembly is disposed within the outer tube system 20; the lower end of the outer pipe system 20 is provided with a drill bit 18, the inner assembly is connected with a pressurized water test capsule, the pressurized water test capsule comprises a pressure maintaining pipe 7, a guide pipe 8, a pressure resisting rubber pipe 12, a one-way valve 13 and a rupture disk 15, the guide pipe 8 is a hollow long rod, the side surface of the upper part of the guide pipe 8 is provided with the pressure maintaining pipe 7, the pressure maintaining pipe 7 is communicated with the pressure resisting rubber pipe 12, the guide pipe 8 is positioned in the pressure resisting rubber pipe 12, and the lower part of the guide pipe 8 is provided with the rupture disk 15; the one-way valve 13 is arranged between the guide pipe 8 and the pressure-resistant rubber pipe 12.
The inner assembly consists of a salvaging head 1, a sealing ring 2, a joint 3, a water pipe 4 and a sealing seat 5 which are all hollow structures, and a water hole A24 is formed in the middle; the inner assembly is connected with the pressurized water test capsule through a nipple 26.
The lower part of the fishing head 1 is connected with the upper part of the water pipe 4 through a connector 3, the connector 3 is provided with a sealing ring 2, and the lower part of the water pipe 4 is connected with a sealing seat 5; the upper end of the salvaging head 1 is a pointed cone structure with a water channel, the lower end of the pointed cone structure is a cylinder with smaller diameter, and the cylinder is matched with the salvaging device for use; the sealing ring 2 is of a stepped hollow cylinder structure, a sealing step 21 is formed by a step positioned on the outer circle, a seat ring 22 is arranged in the outer tube system 20, the smaller diameter of the sealing step 21 is smaller than that of the seat ring 22, the sealing step 21 is clamped in the seat ring 22, a compression gap A is reserved between the sealing ring 2 and the seat ring 22, and the range of the compression gap A is 3-5mm.
The sealing ring 2 can be made of elastic nonmetallic materials such as nylon, rubber, polyurethane and the like, and can also be made of metallic materials.
When the water pressure is increased, the inner assembly moves downwards, and the sealing step 21 on the sealing ring 2 presses the seat ring 22, so that sealing is realized.
The sealing seat 5 has a centralizing function and is of a hollow structure with a large middle part and small two ends, the upper end of the sealing seat is connected with the water pipe 4, the lower end of the sealing seat is provided with the sealing gasket 6, the outer pipe system 20 is internally provided with a centralizing ring 23, the maximum outer diameter of the sealing seat 5 is matched with the centralizing ring 23, and the inner assembly is centralized; the lower end of the outer pipe system 20 is provided with a drill bit 18, the upper end of the drill bit 18 is provided with a concave first sealing angle 17, the lower end of the sealing gasket 6 is provided with a convex second sealing angle 19, and the second sealing angle 19 is matched with the first sealing angle 17 of the drill bit 18 in a convex-concave mode.
The joint 3 is of a hollow cylindrical structure, the upper surface of the joint is provided with a sealing ring 2, and the upper end and the lower end of the joint are provided with connecting threads; the water pipe 4 is of a hollow cylindrical structure, and connecting threads are arranged at two ends of the water pipe; the sealing gasket 6 is of a hollow cylinder structure, and a second sealing angle 19 is arranged on the lower end face.
The sealing gasket 6 is made of rubber, polyurethane and other compressible nonmetallic materials with good elasticity.
The pressure maintaining pipe 7 is a hollow rubber pipe with built-in steel wires and can bear the pressure of more than 8 Mpa; the guide pipe 8 is a hollow long rod, the upper end of the guide pipe is provided with connecting threads, the middle part of the pressure-resistant rubber pipe 12 is provided with a water through hole 14, and the water through hole 14 is provided with a one-way valve 13; the one-way valve 13 allows water to flow from the guide tube 8 into the cavity of the pressure hose 12.
The upper end and the lower end of the pressure-resistant rubber tube 12 are pressed into a whole through a rubber tube connector 10 and a rubber tube jacket 11, sealing rings 25 are arranged in the upper rubber tube connector 10 and the lower rubber tube connector 10, a pressure release channel 9 is arranged on the rubber tube connector 10 at the upper end, and the pressure release channel 9 is communicated with the inside of the pressure-resistant rubber tube 12.
The pressure-resistant rubber tube 12 is matched with the guide tube 8 through sealing rings 25 at two ends and can slide on the guide tube 8.
The compression nut 16 is arranged at the lower end of the guide tube 8, and the rupture disk 15 is arranged at the lower end of the guide tube 8 through the compression nut 16. The rupture disk 15 may be made of rubber, polyurethane, metal, etc. and the bursting pressure should be 3-6Mpa.
The pressure of the pressurized water test is generally 1-1.5Mpa.
Both the inner tube of the rope coring and the inner assembly of the pressurized water testing device may be installed within the outer tube system 20.
The inner diameter of the drill bit is 48-52mm.
The pressurized water test capsule needs to be able to descend from the inside of the drill bit into the borehole or be able to be lifted from the borehole into the drill pipe after pressure relief.
A method for a pressurized water test adopts the device, and comprises the following specific steps: ① The outer pipe system 20 and the drill bit 18 are driven by the rope drill rod to drill downwards, and at the moment, the inner pipe of the rope core drill is arranged in the outer pipe system and is used for extracting the core; ② Stopping drilling when the drilling is carried out to the required depth, carrying out coring operation, and lifting the inner pipe of the rope core drill bit out of the drill rod; ③ Lifting the rope core drill with the outer pipe system and the drill bit upwards to be above a hole section needing a pressurized water test; ④ The inner assembly of the pressurized water test is put into the hole bottom together with the pressurized water test capsule; ⑤ Supplying water into the hole by using water supply equipment on the ground, wherein the pressure of the water supply equipment can be adjusted to 3-6Mpa in advance, so that the water pressure test capsule is ensured to be opened by enough pressure; when water is supplied into the hole, the water flow drives the inner assembly to displace downwards, at the moment, the first sealing angle 17 and the second sealing angle 19 are in pressure contact, so that the first sealing is realized, the inner assembly continues to move downwards, and the sealing step 21 is contacted with the seat ring, so that the second sealing is realized; at this time, water flows through the water through hole 14 to open the one-way valve 13 to supply water into the pressurized water test capsule, the pressure-resistant rubber tube expands until the pressure-resistant rubber tube is tightly attached to the hole wall, the water pressure of continuous water supply rises to break the rupture disk 15 down, the water pressure can immediately drop, the one-way valve 13 locks high-pressure water into the pressurized water test capsule, at this time, water can be continuously supplied, and water flows into the pressurized water test hole end through the guide tube 8, and then pressurized water test can be performed.
After the pressurized water test is finished, lifting the drill rod upwards by 100mm or salvaging by using a salvaging device, lifting upwards by 100mm to pull the pressure maintaining pipe 7 off, so that the pressure release channel 9 is opened, and at the moment, the pressurized water test capsule starts to release pressure and discharges water; and after the capsule for the pressurized water test is restored to the original size, the drill rod can be fished out by using a fisher, and the inner pipe assembly of the rope drilling tool is put into the drill rod to continue drilling.
The pressurized water test device disclosed by the invention is simple in structure, realizes seamless connection of wire-line coring drilling and pressurized water test, and avoids the in-hole accidents caused by repeated lifting and lowering of the drill rod.
The innovation points of the invention include: the pressurized water test method is improved by innovating pressurized water test capsules, and simultaneously two sealing structures are innovated.
And (3) a step of: a seal within the drill pipe; during the test, water can not pass between the drill rod and the hole wall (namely, the drill bit part can not pass water), and a double-sealing structure is designed for the purpose:
① After the second sealing angle 19 of the sealing gasket 6 is contacted with the first sealing angle 17 of the drill bit 18, under the action of water pressure, the sealing gasket 6 is pressed and expanded, the outer diameter of the sealing gasket 6 is enlarged and contacted and pressed with the inner diameter of the rigid body of the drill bit, so that the sealing gasket 6 is bonded and sealed with the inner diameter of the rigid body of the drill bit 18, the second sealing angle 19 and the first sealing angle 17 are matched with each other, and the sealing gasket and the first sealing angle 17 can be bonded together well to realize one-time sealing;
② A seal between the seal ring 2 and the seat ring 22; the sealing ring 2 is of a stepped structure, the diameter of the lower step is smaller than the inner diameter of the seat ring, the diameter of the upper step is larger than the inner diameter of the seat ring, the step part is a sealing step 21, when the sealing gasket 6 is compressed and contracted, the compression gap A gradually decreases until the compression gap A disappears, at the moment, the sealing step 21 is located on the seat ring 22, and the sealing step and the seat ring are tightly attached together under the action of water pressure to realize second heavy sealing.
And II: the pressurized water test section is sealed, the test section cannot leak water upwards, and the section is sealed by a pressurized water test capsule; the check valve 13 is opened to water flow through the water through hole 14 to supply water in the pressurized-water test capsule, the pressurized-water hose expands until the pressurized-water hose clings to the hole wall, the water pressure of continuing to increase to break the rupture disk 15 down, the water pressure can immediately drop, the check valve 13 locks high-pressure water in the pressurized-water hose, water can continue to be supplied at the moment, water flows into the pressurized-water test hole end through the guide pipe 8, the high-pressure water in the pressurized-water hose is locked by the check valve at the moment, the pressurized-water hose is in an expanded state and clings to the hole wall, the water flow of the test section cannot flow upwards, and the sealing of the pressurized-water test section is realized.
Taking a 75mm bore as an example: the outer diameter of the pressure-resistant rubber tube 12 is 42mm, steel wires are arranged in the pressure-resistant rubber tube, and the diameter of the pressure-resistant rubber tube after the minimum expansion is not less than 80mm. The pressure-resistant rubber tube 12 can be designed according to different calibers, and has the same overall structure and principle.
Claims (8)
1. The utility model provides a device of pressurized-water test which characterized in that: comprises an inner assembly, a drill bit (18) and a pressurized water test capsule which are sequentially connected from top to bottom; the inner assembly is arranged in the outer pipe system (20); the lower end of the outer pipe system (20) is provided with a drill bit (18), the inner assembly is connected with a pressurized water test capsule, the pressurized water test capsule comprises a pressure maintaining pipe (7), a guide pipe (8), a pressure resisting rubber pipe (12), a one-way valve (13) and a rupture disk (15), the guide pipe (8) is a hollow long rod, the pressure maintaining pipe (7) is arranged on the side surface of the upper part of the guide pipe (8), the pressure maintaining pipe (7) is communicated with the pressure resisting rubber pipe (12), the guide pipe (8) is positioned in the pressure resisting rubber pipe (12), and the lower part of the guide pipe (8) is provided with the rupture disk (15); the one-way valve (13) is arranged between the guide pipe (8) and the pressure-resistant rubber pipe (12);
A water through hole (14) is arranged in the middle of the pressure-resistant rubber tube (12), and a one-way valve (13) is arranged on the water through hole (14); the one-way valve (13) can enable water to flow into the cavity of the pressure-resistant rubber tube (12) from the guide tube (8);
The inner assembly consists of a salvaging head (1), a sealing ring (2), a joint (3), a water pipe (4) and a sealing seat (5), wherein the salvaging head and the sealing ring are hollow structures, and a water hole A (24) is formed in the middle; the inner assembly is connected with the pressurized water test capsule through a short joint (26);
The lower part of the salvaging head (1) is connected with the upper part of the water pipe (4) through a joint (3), the joint (3) is provided with a sealing ring (2), and the lower part of the water pipe (4) is connected with a sealing seat (5); the upper end of the salvaging head (1) is a pointed cone structure with a water channel, the lower end of the pointed cone structure is a cylinder with smaller diameter, and the cylinder is matched with the salvaging device for use; the sealing ring (2) is of a stepped hollow cylinder structure, a sealing step (21) is formed by the steps located on the outer circle, a seat ring (22) is arranged in the outer tube system (20), the smaller diameter of the sealing step (21) is smaller than that of the seat ring (22), the sealing step (21) is clamped in the seat ring (22), and a compression gap (A) is reserved between the sealing ring (2) and the seat ring (22).
2. A device for a pressurized water test according to claim 1, wherein: the sealing seat (5) has a centralizing function, is of a hollow structure with large middle and small two ends, the upper end is connected with the water pipe (4), the lower end is provided with a sealing gasket (6), a centralizing ring (23) is arranged in the outer pipe system (20), and the maximum outer diameter of the sealing seat (5) is matched with the centralizing ring (23) to centralize the inner assembly; the lower end of the outer pipe system (20) is provided with a drill bit (18), the upper end of the drill bit (18) is provided with a concave sealing angle I (17), the lower end of the sealing gasket (6) is provided with a convex sealing angle II (19), and the sealing angle II (19) is matched with the concave and convex sealing angle I (17) of the drill bit (18).
3. A device for a pressurized water test according to claim 2, wherein: the connector (3) is of a hollow cylindrical structure, the upper surface of the connector is provided with a sealing ring (2), and the upper end and the lower end of the connector are provided with connecting threads; the water pipe (4) is of a hollow cylindrical structure, and connecting threads are arranged at two ends of the water pipe; the sealing gasket (6) is of a hollow cylinder structure, and a second sealing angle (19) is arranged on the lower end face of the sealing gasket.
4. A device for a pressurized water test according to claim 1 or 2, characterized in that: the pressure maintaining pipe (7) is a hollow rubber pipe with built-in steel wires; the guide pipe (8) is a hollow long rod, and the upper end of the guide pipe is provided with connecting threads.
5. A device for a pressurized water test according to claim 1 or 2, characterized in that: the pressure-resistant rubber tube (12) is characterized in that the upper end and the lower end of the pressure-resistant rubber tube (12) are pressed into a whole through a rubber tube connector (10) and a rubber tube jacket (11), sealing rings (25) are arranged in the upper rubber tube connector and the lower rubber tube connector (10), a pressure release channel (9) is arranged on the rubber tube connector (10) at the upper end, and the pressure release channel (9) is communicated with the inside of the pressure-resistant rubber tube (12).
6. A device for a pressurized water test according to claim 1 or 2, characterized in that: the pressure-resistant rubber tube (12) is matched with the guide tube (8) through sealing rings (25) at two ends, and can slide on the guide tube (8).
7. A method of testing pressurized water using the apparatus defined in claim 2, comprising the steps of: ① The outer pipe system (20) and the drill bit (18) are driven by the rope drill rod to drill downwards; ② When drilling to the required depth, core taking operation is carried out, and the inner pipe of the rope core drill tool is lifted out of the drill rod; ③ Lifting the rope core drill with the outer pipe system and the drill bit upwards to be above a hole section needing a pressurized water test; ④ The inner assembly of the pressurized water test is put into the hole bottom together with the pressurized water test capsule; ⑤ Water is supplied to the hole by water supply equipment on the ground, the explosion piece (15) is broken down by the expansion of the pressurized water test capsule, high-pressure water is locked in the pressurized water test capsule by the one-way valve (13), and water can be continuously introduced at the moment, so that the pressurized water test can be performed.
8. A method of testing pressurized water according to claim 7, characterized by the specific steps of: ① The outer pipe system (20) and the drill bit (18) are driven by the rope drill rod to drill downwards, and at the moment, the inner pipe of the rope core drill is arranged in the outer pipe system and is used for extracting a rock core; ② Stopping drilling when the drilling is carried out to the required depth, carrying out coring operation, and lifting the inner pipe of the rope core drill bit out of the drill rod; ③ Lifting the rope core drill with the outer pipe system and the drill bit upwards to be above a hole section needing a pressurized water test; ④ The inner assembly of the pressurized water test is put into the hole bottom together with the pressurized water test capsule; ⑤ Supplying water into the hole by using water supply equipment on the ground, wherein the pressure of the water supply equipment can be adjusted to 3-6Mpa in advance, so that the water pressure test capsule is ensured to be opened by enough pressure; when water is supplied into the hole, the water flow drives the inner assembly to displace downwards, at the moment, the first sealing angle (17) and the second sealing angle (19) are in pressure contact, so that the first sealing is realized, the inner assembly continues to move downwards, and the sealing step (21) is in contact with the seat ring, so that the second sealing is realized; at the moment, water flows into the pressurized water test capsule through the water through hole (14) to supply water to the pressurized water test capsule, the pressure-resistant rubber tube expands until the pressure-resistant rubber tube is tightly attached to the hole wall, the water pressure of continuous water supply rises to break down the rupture disk (15), the water pressure can immediately drop, the one-way valve (13) locks high-pressure water into the pressurized water test capsule, at the moment, water can be continuously supplied, and water flows into the pressurized water test hole end through the guide tube (8), and then pressurized water test can be carried out.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110856091.9A CN113670789B (en) | 2021-07-28 | 2021-07-28 | Method and device for pressurized water test |
Applications Claiming Priority (1)
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